How is a satellite built? How do they fly? How do they communicate and how does the network operate? You will get all the answers in this course from teachers and researchers from three schools associated with Institut Mines-Télécom.
The course is made of : teaching videos, equipment demonstrations and simulation programs. They will guide you through the discovery of satellite communications. Professionals in the space field will share there vocation for this scientific and technical sector.
Have you ever wanted to know more about transponders, the geostationary orbit, QPSK modulation, channel coding, link budget, TCP over large bandwdith x delay product links ?
This course is for you! This course is available in English: French-speaking lecturers with English subtitles and fully translated contents (slides, practices).
This MOOC is supported by the Patrick and Lina Drahi Foundation.

Taught By

Laurent Franck

Tarik Benaddi

Julien Fasson

Nathalie Thomas

Marie-Laure Boucheret

Transcript

-We now have a more or less clear view of the various communication services and of their strengths and weaknesses, or it was the intent of this sequence. To finish structuring this vision, we will talk about the anatomy of a communication network. And by looking at the radiography of these communication networks, we will be able to locate their various organs. You will see, it is much simpler than the human body. What is interesting is that, once the organs are identified, we will locate the various satellite communication services at the level of these organs. The simplest is, as shown here, to start with an example of mobile telephony. Starting from the left, we can see a mobile telephony terminal, as you probably have in your pocket, and that it will connect, through the mobile telephony network, to a fixed terminal, shown on the far right. We start from the mobile phone, on the left, and we enter a first network called an access network. Here, this access network uses a LTE or 4G technology, for example. Then, after this access network, we now enter the core network. The core network is the exclusive domain of the mobile telephony operator. We go through this core network, and we enter a second access network, which brings us to the fixed telephone, and this access network uses a twisted copper pair technology. When we look at this picture, we can see that the constraints of access networks and core networks are in the end quite different, we can easily imagine that the core network will carry a lot more traffic than, for example, the access network, that will only cover the LTE cell. So let us see, in relation with this network radiography, how satellite services are located. We can see that almost all services are located at the level of the access network, and this is characteristic of one of the strengths of satellites, which is to be capable of functioning anywhere on Earth, including where there is no terrestrial network. So it is normal that most services are located at the access network. One exception to this is backhauling or trunking, but once again, I mentioned that backhauling and trunking services were often a backup plan, a plan B to protect against failure, this time not of the access network, but of the core network. So all in all, everything fits together.

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